Equivalency of Paper Weight
and Thickness

Conversions between US and Metric

Bond Offset Cover Tag Index Points *Caliper
(inches)

*Caliper
(mm)

Metric
(gr/m2)
16
40
22
37
33
 3.2 .0032 0.081 60.2 gsm
18
45
24
41
37
 3.6 .0036 0.092 67.7 gsm
20
50
28
46
42
 3.8 .0038 0.097 75.2 gsm
24
60
33
56
50
 4.8 .0048 0.120 90.3 gsm
28
70
39
64
58
 5.8 .0058 0.147 105.4 gsm
29
73
40
62
60
 6 .0060 0.152 109.1 gsm
31
81
45
73
66
 6.1 .0061 0.155 116.6 gsm
35
90
48
80
74
 6.2 .0062 0.157 131.7 gsm
36
90
50
82
75
 6.8 .0068 0.173 135.4 gsm
39
100
54
90
81
 7.2 .0072 0.183 146.7 gsm
40
100
56
93
83
 7.3 .0073 0.185 150 gsm
43
110
60
100
90
 7.4 .0074 0.188 162 gsm
44
110
61
102
92
 7.6 .0076 0.193 166 gsm
47
120
65
108
97
 8 .0078 0.198 177 gsm
53
135
74
122
110
 9 .0085 0.216 199 gsm
54
137
75
125
113
 9 .0090 0.229 203 gsm
58
146
80
134
120
 9.5 .0092 0.234 218 gsm
65
165
90
150
135
 10 .0095 0.241 245 gsm
67
170
93
156
140
 10.5 .0098 0.250 252 gsm
72
183
100
166
150
 11 .0114 0.289 271 gsm
76
192
105
175
158
 13 .0131 0.330 286 gsm
82
208
114
189
170
 14 .0140 0.356 308 gsm
87
220
120
200
180
 15 .0150 0.380 312 gsm
88
223
130
203
200
 16 .0157 0.400 330 gsm
105
267
146
244
220
 18 .0175 0.445 385 gsm
Bond Offset Cover  Tag  Index Points *Caliper
(inches) 		*Caliper
(mm)		 Metric
(gr/m2)
 

 

* Because it depends on the type of paper it is an estimation. You could expect average differences of about 10%.
The darker gray cells represent the most common paper weights for that category.

METRIC: the weight of one sheet of paper 100x100cm (1 sq. meter)

US:
Bond: the weight of 500 sheets of paper 17"x22"
Offset: the weight of 500 sheets of paper 25"x38"
Cover: the weight of 500 sheets of paper 20"x26"
Tag: the weight of 500 sheets of paper 24"x36"
Index: the weight of 500 sheets of paper 25.5"x30.5"